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133532947842151
2 năm trước
Cho 6,75g Al tác dụng 200ml aM CuCl2 và bM FeCl2 . Sau khi phản ứng hoàn toàn thu được dd Y và 23,4g chất rắn. Cho y tác dụng với NaOH dư thu được 2,25g chất rắn. Tính a và b
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